Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeaff9c89a51f6b…

MALICIOUS

PDF

80.8 KB Created: 2020-11-20 10:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b62a087054f11ab2dea31c8f5ae94f5f SHA-1: dc1db2f5afe6f48e2951e338bf057e22cc1a8bf6 SHA-256: dbeaff9c89a51f6b910467ac86fbd3e7c59be9239284bb34d2fec9d424aff169
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/123?utm_term=monster+super+league+mod+apk+latest PDF link annotation
    • https://zonerizarom.weebly.com/uploads/1/3/4/3/134310007/7073654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5f94d72cc8629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_5fb59ebde409d.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/rijaxuvizikidorufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4647c29-783d-44a0-95f0-d2c086cdf42b/livro_quem_ama_educa_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/pijalejifigojin.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/school_christmas_door_decorating_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/yelm_washington_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/alzheimer_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/95682746165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b48522-1b03-4f1e-b1ee-e5e32142da60/pifegemowiwudilodub.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/dance_of_anger.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AA 5180 bytes
SHA-256: 3109c36187624accafc31181d35589a045bca8230cf8c1d45964ef6b48f0ee80
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 13052 bytes
SHA-256: d291443b2fbbf82c8379b8c799d7dbf866ba3fcf25e609c75845322724aa3844
font_02_sfnt_off00010fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 16368 bytes
SHA-256: b4130b4ac29cf16517e5a835d9c465f5b552017df74d25beb720dddc51cdde97
font_03_sfnt_off000125d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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